Fine Diamond Jewellery · Est. Atelier
Every Dia Hart piece is hand-set with certified diamonds and cast in an atelier that measures success in decades, not seasons. This is jewellery made to be inherited.
The Collections
From the solitaire that starts a story to the everyday drape of a tennis bracelet — each edit is composed around one stone-cutting philosophy.
The Signature Piece
A single round-brilliant stone, raised on a six-claw crown to let light enter from every angle. Cut, polished and set by hand across eleven days in our atelier.
Why Dia Hart
Every stone is traced to conflict-free origins under the Kimberley Process, verified before it ever reaches the bench.
Our setters spend an average of eleven days per piece, seating every stone by hand under magnification.
Each piece ships with an independent grading report and a lifetime resizing, cleaning and inspection promise.
“I didn't just buy a ring — I sat with the setter as she chose the angle for every claw. That's the difference Dia Hart makes.”— Meera K., Hartleigh Solitaire